Combi Perfect Match 6525 Manual do Utilizador descarregar pdf (Página 4)

Sample Flow

CO,N2,H2

shows existing gases.

N2,H2ON2

extraction

furnace

carrier gas

graphite

crucible

dust filter

purge gas line

dehydrator

decarburizer

CO detector

(NDIR)

cupric

oxide

flow

controller

N2 detector

(TCD)

flow meter

2,NO2,H2O

Highly acclaimed user-friendly functions and superb operability

Multipoint/One-point calibration

The EMGA can be calibrated by conven-

tional multipoint calibration with up to 30

points using either a standard sample or

standard gas. For rough, on-site calibra-

tion where speed is of the essence, sen-

sitivity correction, blank correction and

single one-point calibration are also

available.

Quick calibration from standard sam-

ple analysis

If up to five standard values are stored

in memory prior to commencing the anal-

ysis, it is possible to use analysis results

for calibration purposes simply by slot-

ting a standard sample analysis into rou-

tine analysis work.

Unique inner crucible

The inner crucible mode allows indirect

heating of the sample and makes it easy

to hold any desired temperature. It is par-

ticularly useful for analysing low melting

point metals and for temperature-

programmed analysis.

Automatic mass compensation

If an optional electronic balance is con-

nected to the EMGA, the mass meas-

ured by the balance will be displayed on

the color TFT screen and the operator

need only press the keyboard to input

these data for automatic mass compen-

sation.

Outstanding self-diagnosis

The analyser senses when it is neces-

sary to replace the dust filter or change

the reagent, and displays an appropriate

message on the color TFT screen. It

also monitors control of the extraction

furnace and the working of all parts, trig-

gering an alarm when things are not as

they should be. Alarm messages are dis-

played on the Screen, printed out and/or

output via RS-232C interface.

Time-saving mode/Interrupt mode

The EMGA is provided with a timesav-

ing mode to outgas the crucible in

advance so that the analysis can

proceed immediately the sample arrives.

It also features a special interrupt mode

which makes it possible to override the

pre-programmed sample sequence and

give priority to samples requiring urgent

analysis.

Easy operation

under windows software

With its priority on easy operation, the

instrumentation unit is operated under

windows software. The color TFT

screen gives direct display of analysis

results, analysis conditions, alarm mes-

sages and so forth.

Direct furnace monitoring

A quartz window is provided directly

above the sample inlet so that the opera-

tor can monitor the sample in the cruci-

ble. The window opens automatically

when heating starts and remains open

until it finishes, permitting the operator

to see the sample melting, generating

gas and so forth. This window facilitates

effective use of the manual power hold

function and other analysis methods

where changes in the sample have to be

watched.

When a high current is passed through a graphite crucible placed between the upper and lower electrodes of the

extraction furnace, the temperature of the crucible is increased rapidly by Joule heating. Raising the temperature

outgasses the crucible, and the sample is then introduced and the temperature increased again for thermal

decomposition. The O, N and H in the sample are carried to the detectors by the carrier gas in the forms of CO,

2 and H2 respectively. A non-dispersive infrared detector detects the CO and a thermal conductivity detector

the N

2. The detectors output a signal corresponding to the concentration of the gas detected. This signal is linear-

ised and integrated by a microprocessor and then blank corrected in accordance with the calibration curve and

corrected for sample weight. The resulting data is displayed as the measurement results.

1 2 3 4 5 6 7 8 9 10 11 12

Comentários a estes Manuais

Sem comentários

Combi Perfect Match 6525 Manual do Utilizador Página 4

Comentários a estes Manuais

Manuais e produtos relacionados com Carrinhos de bebé Combi Perfect Match 6525